Watch Castle Season 4 Online
In Castle season 4, Castle and Beckett come face to face with zombies, show dogs, Elvis and a live tiger. Watch Castle Season 4 online so you don't miss a minute of the fun, the drama or the romance.
![A Priest on Castle](https://tv-fanatic-res.cloudinary.com/iu/s--8_o_dR1W--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371231913/a-priest-on-castle.png)
Beckett is hot on the trail of the person who shot her mother. Read on for a recap of the Castle season finale.
![Zombies on Castle?](https://tv-fanatic-res.cloudinary.com/iu/s--vCP8RPA_--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371229199/zombies-on-castle.png)
A zombie attack on Castle?!? That's the theory that starts to fly on this season four episode.
![Ready to Brawl](https://tv-fanatic-res.cloudinary.com/iu/s---ElXw_BO--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371228947/ready-to-brawl.png)
It's a Firefly reunion on Castle this week, as Adam Baldwin guest stars in the fun role of Detective Ethan Slaughter.
![Shirtless Holdup](https://tv-fanatic-res.cloudinary.com/iu/s--j5p4F33U--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371228560/shirtless-holdup.png)
Brett Tucker guest stars this week as a detective from Scotland Yard. He teams up with Beckett and Castle on a personal case.
![Tim Guinee on Castle](https://tv-fanatic-res.cloudinary.com/iu/s--k8-cON3T--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371228233/tim-guinee-on-castle.png)
A bomb goes off during a protest this week, causing Castle and Beckett to go back over the timeline of the event, and also to evaluate their lives.
![A Night of Dance Set](https://tv-fanatic-res.cloudinary.com/iu/s--WdllBII2--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371227497/a-night-of-dance-set.png)
Castle delves into the world of reality TV this week, as a contestant on "A Night of Dance" is murdered n her dressing room.
![Ryan and Espo](https://tv-fanatic-res.cloudinary.com/iu/s--q4LY9Ejr--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371226913/ryan-and-espo.png)
The detectives look into the deaths of women dressed as fairytale characters while Martha puts on a one woman show.
![Sophia Turner and Company](https://tv-fanatic-res.cloudinary.com/iu/s--Sil2QKDZ--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371226699/sophia-turner-and-company.png)
This is the conclusion of the annual two-parter. It features Castle and Beckett racing to stop a chain of dangerous events from unfolding.
![Jennifer Beals on Castle](https://tv-fanatic-res.cloudinary.com/iu/s--ZsyZIcr0--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371226469/jennifer-beals-on-castle.png)
Castle and Beckett are after a killer this week, which leads them to a major conspiracy. Jennifer Beals guest stars.
![Castle in 1947](https://tv-fanatic-res.cloudinary.com/iu/s--gP1PNOBa--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371226102/castle-in-1947.png)
Told through flashbacks, Castle and the detectives investigate a murder linked to a double homicide in the 1940's.
![Hilarie Burton on Castle](https://tv-fanatic-res.cloudinary.com/iu/s--73TIw8RA--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371225889/hilarie-burton-on-castle.png)
The murder of a dog trainer/judge has Castle and Beckett looking into guest star Hilarie Burton's character, Kay Cappuccio, a character resembling reality star Kim Kardashian.
![Castle, Beckett and the Mayor](https://tv-fanatic-res.cloudinary.com/iu/s--nCMUiP6x--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371225662/castle-beckett-and-the-mayor.png)
The detectives investigate a murder which leads back to Castle's friend, Mayor Welden.
![Sharing Chinese Food](https://tv-fanatic-res.cloudinary.com/iu/s--3UIoJxTZ--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371225403/sharing-chinese-food.png)
Ryan prepares to get married and the detectives look to solve the murder of a pick up artist.
![Handcuffed Together](https://tv-fanatic-res.cloudinary.com/iu/s--T9pScnm---/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371224824/handcuffed-together.png)
Castle and Beckett wake up handcuffed together with no memory of the situation. Time to find out what happened!
![A Case of PTSD](https://tv-fanatic-res.cloudinary.com/iu/s--hTnymDuj--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371224495/a-case-of-ptsd.png)
A sniper is making waves in NYC, causing Beckett to deal with her PTSD. Castle and Esposito do their best to help her through the situation.
![A Casino Case](https://tv-fanatic-res.cloudinary.com/iu/s--76KldQc2--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371224304/a-casino-case.png)
An Atlantic City casino owner is found dead in NYC leading to a bachelor party for Ryan on the latest episode of Castle.
![Dean Norris on Castle](https://tv-fanatic-res.cloudinary.com/iu/s--xiCv6yRx--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371224170/dean-norris-on-castle.png)
A bank robbery goes bad when Castle and Martha are held hostage inside. Find out what happened in the latest episode of Castle now!
![A Ghost Did It?](https://tv-fanatic-res.cloudinary.com/iu/s--inUsnJPH--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371223979/a-ghost-did-it.png)
Castle and Beckett hunt down the murder of a famous ghost hunter on the latest installment of Castle.
![Kristin Lehman on Castle](https://tv-fanatic-res.cloudinary.com/iu/s--7FJZDwZi--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371223719/kristin-lehman-on-castle.png)
Kristin Lehman guest stars this week as Serena Kaya, an insurance investigator who helps out Beckett & Castle when a murder and robbery takes place at an art museum.
![Coffee at the Crime Scene](https://tv-fanatic-res.cloudinary.com/iu/s--F7wxZdwg--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371223538/coffee-at-the-crime-scene.png)
Uh-oh. The gun used in a murder this week is discovered to be Det. Ryan's former service weapon. That can't be good.
![In the Coroner's Office](https://tv-fanatic-res.cloudinary.com/iu/s--8WwurM1a--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371223280/in-the-coroners-office.png)
A missing body leads the detectives into the world of cryonics and Alexis gets news from Stanford.
![Beckett and Castle at Work](https://tv-fanatic-res.cloudinary.com/iu/s--MWtHd2AQ--/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371223045/beckett-and-castle-at-work.png)
Beckett & Castle track down a vigilante named Lone Vengeance through the city and make some headway with Captain Gates.
![Return of Beckett](https://tv-fanatic-res.cloudinary.com/iu/s--sdIVVtg---/t_small_l/cs_srgb,d_tv-fanatic-placeholder-square.png,f_auto,fl_strip_profile.lossy,q_auto:420/v1371222487/return-of-beckett.png)
On the fourth season premiere of Castle, Beckett's fate is found out and the detectives meet their new captain. Will Castle & Beckett reconnect? Find out in our review now.